BS-4752 - 1971; Specification for circuit-breakers of rated voltage up to and including 1000 volts a.c. and 1200 volts d.c.

BS-4752 - 1971; Specification for circuit-breakers of rated voltage up to and including 1000 volts a.c. and 1200 volts d.c. - London BSI 1971 - 70p

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